The Smart Modulating Thermostat is compatible with OpenTherm boilers. To know if your boiler is OpenTherm compatible, you can check the following:
- Look for an OpenTherm logo on your boiler. It can be hidden behind a removable panel.
- Look for OpenTherm thermostat terminals in the guide of your boiler.
You can also contact your heating engineer or the customer service department of the company that makes your boiler.